Specifying an average-length exponent enables the RED
average queue length computation.
A higher value smooths out the average and slows WRED
reaction to congestion and decongestion, accommodating short bursts
without dropping. Too large a value can smooth the average to the
point that WRED does not react at all.
A lower value speeds up WRED reaction. Too low a value
can cause overreaction to short bursts, dropping packets unnecessarily.
(Optional) Set the minimum and maximum threshold for committed